GTA

All Springer/NP/PCP Air Gun Discussion General => PCP/CO2/HPA Air Gun Gates "The Darkside" => Topic started by: FuzzyGrub on December 18, 2016, 08:50:45 PM

Title: Twins: but NOT Identical
Post by: FuzzyGrub on December 18, 2016, 08:50:45 PM
While one is basically a stockish Prod, the other is 177 cal, using a 1720T barrel, machined down bolt, and modified Mrod mag.  Barrel work by David Furr, aka Rocker1.   I really liked the wrap around hand guard so had to have one in 177.  :) 

(http://joefish.homestead.com/TWINS.JPG)


FWIW: The 1720T LW barrel is slightly different then Prod.  The distance from transfer port to breech end is slightly shorter.  So to machine in the o-ring groove, you need to cut the end off and redo.  So it is 11" vs stock of 12".   A more cost effective solution would be going to a 177 mrod barrel and cutting it down.   
Title: Re: Twins: but not Identicle
Post by: jp_over on December 18, 2016, 08:57:20 PM
Very sharp!  What's the dry weight on those rigs?
Title: Re: Twins: but not Identicle
Post by: FuzzyGrub on December 18, 2016, 11:47:01 PM
What's the dry weight on those rigs?

Wet (scope, mag, and air): 6.5lb  :) 
Title: Re: Twins: but NOT Identical
Post by: larspawn on December 18, 2016, 11:52:06 PM
Love the look!  What wrap around grip is that?
Title: Re: Twins: but NOT Identical
Post by: oldpro on December 18, 2016, 11:55:22 PM
Very nice work. No 30 cal Prod yet!!! Just kidding
Title: Re: Twins: but NOT Identical
Post by: FuzzyGrub on December 19, 2016, 12:00:19 AM
Love the look!  What wrap around grip is that?

Magpul, but needs a little work to fit (grinding.  Bolts to the trigger tab and two barrel bands. Very sturdy.  More info here: http://www.marauderairrifle.com/forum/viewtopic.php?f=33&t=11200 (http://www.marauderairrifle.com/forum/viewtopic.php?f=33&t=11200)
Title: Re: Twins: but NOT Identical
Post by: FuzzyGrub on December 19, 2016, 12:04:47 AM
Very nice work. No 30 cal Prod yet!!!

No, and haven't even done the 25 cal yet. 
Title: Re: Twins: but not Identicle
Post by: jp_over on December 19, 2016, 06:18:20 AM
What's the dry weight on those rigs?

Wet (scope, mag, and air): 6.5lb  :)

Thanks - that sounds about perfect!
Title: Re: Twins: but NOT Identical
Post by: Wayne52 on December 19, 2016, 06:47:03 AM
Very nice rigs for sure 8)
Title: Re: Twins: but NOT Identical
Post by: Tucobenedicto on December 19, 2016, 03:07:02 PM
Great tactical look  8)
Title: Re: Twins: but NOT Identical
Post by: K.O. on December 19, 2016, 03:26:11 PM
Nice!!

 I get dizzy looking at the sideways pic so here is a rotated re-post of it...  and thanks for the response   to me question in the other thread...

For about 40-50$ you could try a 1:15 twist Daisy 953 barrel,  the 853 L.W.  barrel was about 80$ when I checked a couple years ago...
Title: Re: Twins: but NOT Identical
Post by: FuzzyGrub on December 19, 2016, 04:41:12 PM
Yea, sorry about the pic.  For some reason my hosting homestead account does not like photos from my iphone.  If you use their rotation features, the pics don't rotate, just get out of aspect ratio.  I have also tried rotating before hosting, and still an issue.  There is something in the metadata causing the problem, and haven't spent the time to figure it out. 

Thanks for adjusting.  :) 

I have had good luck with the 1720T oem LW barrels, and that is what I had on hand. 
Title: Re: Twins: but NOT Identical
Post by: screwwork on December 19, 2016, 11:44:09 PM
Congrats John on the .177 repeater Prod!
Did you use the Prod breech or the 1720T breech?
How did you get the mrod .177 mag to fit the breech too?

Randy
Title: Re: Twins: but NOT Identical
Post by: FuzzyGrub on December 20, 2016, 04:35:51 AM
Did you use the Prod breech or the 1720T breech?
How did you get the mrod .177 mag to fit the breech too?

The 1720 breech is too wide and has angled ends, which are good for fingers, but not mags. The barrel does not extend into breech for mag use, either.   I used prod breech.  That means you also have to turn down the Prod bolt to 177 dimensions.

To use a Mrod mag, you need to shim the back of the breech (0.035") and flat sand the bottom of the mag until it fits in the barrel slot.  You need to be careful, because it will be close to breaking thru.   You can also flat sand the left side if you want that to be flush with breech.   Alternately, if you have the equipment, you can slot the breech deeper. 
Title: Re: Twins: but NOT Identical
Post by: screwwork on December 20, 2016, 11:24:13 AM
Did you use the Prod breech or the 1720T breech?
How did you get the mrod .177 mag to fit the breech too?

The 1720 breech is too wide and has angled ends, which are good for fingers, but not mags. The barrel does not extend into breech for mag use, either.   I used prod breech.  That means you also have to turn down the Prod bolt to 177 dimensions.

To use a Mrod mag, you need to shim the back of the breech (0.035") and flat sand the bottom of the mag until it fits in the barrel slot.  You need to be careful, because it will be close to breaking thru.   You can also flat sand the left side if you want that to be flush with breech.   Alternately, if you have the equipment, you can slot the breech deeper. 

Thanks for the info John ;D
Title: Re: Twins: but NOT Identical
Post by: screwwork on December 20, 2016, 11:31:14 AM
Very nice work. No 30 cal Prod yet!!! Just kidding

I can make 30 cal Prod out of the 25 cal mini-rod I got from you Travis ;)
It would only get maybe 2 1/2 shots with the 65cc tube, if I have the Lloyd's Prod double tube kit installed I would increase the shot count..